An exemplary mobile device activation system may receive, by way of a mobile device not currently activated on a mobile network, a request to initiate an activation process to activate the mobile device on the mobile network, authenticate the mobile device to a user account associated with the mobile network, establish an activation session between the authenticated mobile device and the user account, provide, during the activation session, an interactive activation flow by way of the authenticated mobile device, and activate the mobile device on the mobile network based on user interaction with the interactive activation flow by way of the mobile device.